JPWO2017115808A1 - Excavator - Google Patents

Abstract

  The shovel according to the embodiment of the present invention includes a left monitor (40L) attached to the left pillar (10PL), a right monitor (40R) attached to the right pillar (10PR), and a left side of the upper swing body (3). Controller for controlling each of the left camera (80L) that captures the area of the left, the right camera (80R) that captures the area on the right side of the upper swing body (3), and the left monitor (40L) and the right monitor (40R). 30). The controller (30) continuously displays a mirror image generated from an image captured by the left camera (80L) on the left monitor (40L) and a mirror image generated from an image captured by the right camera (80R). The image is continuously displayed on the right monitor (40R).

Description

  The present invention relates to an excavator.

  There is known an excavator to which a right rear mirror is attached so that the right rear of the upper swing body can be visually observed (see Patent Document 1).

JP 2006-298171 A

  The excavator of Patent Document 1 enables an operator of the excavator to visually observe the blind spot on the right side of the upper swing body of the excavator from the driver's cabin through a right rear mirror.

  However, in order to view the blind spot on the right side of the upper swing body, the driver needs to face his face in the direction (right side) where the right rear mirror is located. Therefore, the operator cannot see the blind spot unless he / she looks away from the front and looks at the right rear mirror during the operation of the shovel. In addition, since a boom exists between the cab and the right rear mirror, the operator may not be able to visually recognize the right rear mirror depending on the angle of the boom.

  Therefore, during operation of the excavator, the operator can visually recognize the blind spot on the side of the shovel without looking away from the front, and intuitively grasp whether there is an object in the blind spot on the side of the shovel. It is desirable to provide an excavator that allows it to be done.

  An excavator according to an embodiment of the present invention includes a lower traveling body, an upper revolving body that is pivotably attached to the lower traveling body, a cab attached to the upper revolving body, and a left pillar inside the cab. A left monitor attached to a right pillar attached to the right pillar inside the cab, a left camera for imaging a left area of the upper swing body, and an image of a right area of the upper swing body And a control device that controls each of the left monitor and the right monitor, and the control device continuously displays a mirror image generated from an image captured by the left camera on the left monitor. And a mirror image generated from an image captured by the right camera is continuously displayed on the right monitor.

  By the above-described means, the operator can check the image in the field of view without taking his eyes from the front during the operation of the shovel. As a result, an excavator that enables the operator to visually recognize the side view of the side of the excavator during the operation of the excavator and intuitively grasp whether or not an object exists in the blind spot on the side of the excavator. Provided.

It is a left view of the shovel which concerns on the Example of this invention. It is a top view of the upper revolving structure of the excavator of FIG. It is a right view of the upper revolving body of the shovel of FIG. It is a figure which shows the structural example of the display system mounted in the shovel of FIG. It is a perspective view inside the cabin of the shovel of FIG. It is a figure which shows another structural example of a display system.

  Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings. In the drawings, the same components are denoted by the same reference numerals, and redundant description may be omitted.

  FIG. 1 is a left side view of an excavator according to an embodiment of the present invention. An upper swing body 3 is turnably mounted on the lower traveling body 1 of the excavator via a swing mechanism 2. A boom 4 is attached to the upper swing body 3. An arm 5 is attached to the tip of the boom 4, and a bucket 6 is attached to the tip of the arm 5 as an end attachment.

  The boom 4, the arm 5, and the bucket 6 constitute a drilling attachment as an example of the attachment, and are hydraulically driven by the boom cylinder 7, the arm cylinder 8, and the bucket cylinder 9, respectively.

  The upper swing body 3 mainly includes a cover 3a, a counter weight 3b, and a platform 3c. A cabin 10 as a cab is mounted on the front of the platform 3c, and a power source such as an engine 11 is mounted on the rear thereof. A power source such as the engine 11 is covered with a cover 3a, and a counterweight 3b is attached to the rear part of the cover 3a. FIG. 1 transparently shows the interior of the cabin 10.

  FIG. 2 is a top view of the upper swing body 3 of the excavator of FIG. 1, and FIG. 3 is a right side view of the upper swing body 3. 2 and 3 do not show the drilling attachment for the sake of clarity.

  As shown in FIGS. 1 to 3, a left camera 80 </ b> L is attached to the stay 10 a on the left front side of the cabin 10. A back camera 80B is attached to the upper part of the counterweight 3b. A right camera 80R is attached to the right front handrail 3d of the upper swing body 3.

  As shown in FIG. 2, the left camera 80L is configured such that the horizontal angle of view α1 is within a range of 20 to 70 degrees, for example. Similarly, the right camera 80R is configured such that the horizontal angle of view α2 is within a range of 20 to 70 degrees, for example. Further, the horizontal view angle α3 of the back camera 80B is configured to be larger than the horizontal view angles α1 and α2 of the left camera 80L and the right camera 80R, for example, within a range of 150 to 170 degrees. For example, a wide-angle camera is employed as the back camera 80B.

  The left camera 80L and the right camera 80R are attached so that the side surface of the upper swing body 3 is included in the imaging range. This is because the excavator operator who has viewed the images captured by the left camera 80L and the right camera 80R can easily recognize the positional relationship between the shovel and the objects existing around the shovel.

  Specifically, the left camera 80L has a left front end of the stay 10a and the cabin 10 so that the mounting height is between the height of the platform 3c of the upper swing body 3 and the height of the upper surface (ceiling surface) of the cabin 10. It is attached to the left front end of the platform 3c. The right camera 80R is attached to the handrail 3d, the right front end of the platform 3c, the tool box 3e, and the like so that the attachment height is between the height of the platform 3c of the upper swing body 3 and the height of the upper surface of the cabin 10. . FIG. 3 shows that the left camera 80L is attached to the stay 10a at a height approximately halfway between the height of the platform 3c and the upper surface of the cabin 10, and the right camera 80R is substantially the same height as the left camera 80L. The state attached to 3d is shown.

  The back camera 80B is attached so that the imaging range includes the upper rear end of the counterweight 3b. This is because the operator of the shovel who has seen the image captured by the back camera 80B can easily recognize the positional relationship between the shovel and the object existing around the shovel.

  Each of the left camera 80L, the right camera 80R, and the back camera 80B may be attached using a bracket. In addition, each of the left camera 80L, the right camera 80R, and the back camera 80B may be retractable and removable to prevent damage when the excavator is transported or when the camera is not used such as when the monitor is not mounted. It may be.

  Each of the left camera 80 </ b> L, the right camera 80 </ b> R, and the back camera 80 </ b> B is a camera having an image sensor such as a CCD or a CMOS, and transmits a captured image to the controller 30 in the cabin 10.

  The above-described excavator includes a left rear mirror that reflects the left rear of the shovel near the left camera 80L, and a right rear mirror that reflects the right rear of the shovel near the right camera 80R. Further, a right front mirror that reflects the right front of the shovel and a rear mirror that reflects the rear of the shovel are provided on the right rear end of the upper surface of the counterweight 3b.

  The excavator may include an obstacle detection device that detects obstacles present in the vicinity. The obstacle is, for example, an object that enters a predetermined range around the excavator, an object that exists within the predetermined range, and includes a construction machine, a vehicle, a person, a building, peripheral equipment, and the like. The obstacle detection device is attached to the right side, the left side, and the rear side of the upper swing body 3 so that, for example, obstacles existing on the right side, the left side, and the rear side of the excavator can be detected. The obstacle detection device includes, for example, a millimeter wave radar, a stereo camera, an ultrasonic sensor, an infrared sensor, and the like. The obstacle detection device may detect the obstacle by performing image processing on an image captured by the monocular camera. In this case, the obstacle detection device may use a left camera 80L, a right camera 80R, and a back camera 80B as imaging devices.

  Next, a configuration example of the display system mounted on the excavator in FIG. 1 will be described with reference to FIG. FIG. 4 is a block diagram illustrating a configuration example of the display system. The display system mainly includes a controller 30, a display device 40, an adjustment system 50, an imaging device 80, and the like. The display device 40 includes a main monitor 40M, a left monitor 40L, a right monitor 40R, and a back monitor 40B. The imaging device 80 includes a left camera 80L, a right camera 80R, and a back camera 80B.

  The controller 30 is a control device that controls the display device 40. The controller 30 includes an arithmetic processing unit that includes a CPU and an internal memory 30a. Various functions of the controller 30 are realized by the CPU executing programs stored in the internal memory.

  The display device 40 displays a screen including various information in response to a command from the controller 30. The display device 40 is a liquid crystal display connected to the controller 30, for example. The display device 40 is connected to the controller 30 via, for example, a communication network such as CAN, a dedicated line, or the like.

  In the present embodiment, the controller 30 includes a screen generation unit 30 b that generates a screen displayed on the display device 40. The screen generation unit 30b generates a screen based on image data obtained from the imaging device 80, for example.

  Specifically, the screen generation unit 30b generates a screen to be displayed on the main monitor 40M based on images captured by each of the plurality of cameras. The main monitor 40M includes an image display unit 41M and a switch panel 42M. The switch panel 42M is a switch panel including various hardware switches.

  For example, the screen generation unit 30b generates a composite image based on an image captured by at least two of the back camera 80B, the left side camera, and the right side camera, and displays a screen including the generated composite image as an image display unit 41M. To display. The left side camera is a camera different from the left camera 80L attached to the upper left end of the cover 3a. Similarly, the right side camera is a camera different from the right camera 80R attached to the upper right end of the cover 3a. The screen generation unit 30b may cause the image display unit 41M to display a screen including an image captured by any of the back camera 80B, the left side camera, and the right side camera.

  Further, the screen generation unit 30b converts data to be displayed on the image display unit 41M out of various data input from the outside into an image signal. The data input to the controller 30 from the outside includes, for example, data indicating the temperature of engine cooling water, data indicating the temperature of hydraulic oil, data indicating the remaining amount of urea water, data indicating the remaining amount of fuel, and the like. The screen generation unit 30b outputs the image signal obtained by the conversion to the main monitor 40M, and causes the image display unit 41M of the main monitor 40M to display a screen including the composite image and information regarding various data.

  The screen generation unit 30b generates a mirror image based on the image captured by the left camera 80L, and continuously displays the generated mirror image on the left monitor 40L. This is because the left monitor 40L functions as if it is a mirror. The “continuously display” configuration includes a configuration in which an image captured by the left camera 80L is always displayed on the left monitor 40L, but excludes a configuration in which another image is temporarily displayed on the left monitor 40L for a short time. It is not a thing.

  Similarly, the screen generation unit 30b continuously displays a mirror image generated based on an image captured by the right camera 80R on the right monitor 40R, and generates a mirror image generated based on an image captured by the back camera 80B. Is continuously displayed on the back monitor 40B. This is because each of the right monitor 40R and the back monitor 40B functions as if it is a mirror.

  The controller 30 may determine the presence / absence of an obstacle entering a predetermined range around the excavator and the presence / absence of an obstacle within the predetermined range based on the output of the obstacle detection device. Then, when it is determined that the obstacle has entered the predetermined range, or when it is determined that the obstacle exists within the predetermined range, an alarm, a voice message, or the like may be output. For example, when an obstacle is detected on the left side of the excavator by the obstacle detection device, an alarm sound may be output from a speaker built in the left monitor 40L. Alternatively, an alarm sound may be output from a separate speaker installed on the left side of the driver's seat. Similarly, when an obstacle is detected on the right side of the excavator by the obstacle detection device, an alarm sound may be output from a speaker built in the right monitor 40R. Alternatively, an alarm sound may be output from a separate speaker installed on the right side of the driver's seat. The same applies to the case where an obstacle existing behind the excavator is detected.

  The screen generation unit 30b causes the back camera 80B, the left camera 80L, and the right camera 80R to correspond one-to-one with the back monitor 40B, the left monitor 40L, and the right monitor 40R. Therefore, the images displayed on each monitor can be displayed larger than when images captured by a plurality of cameras are displayed on one monitor. That is, it is possible to improve the visibility of images displayed on each monitor.

  The screen generation unit 30b may be mounted on each monitor that constitutes the display device 40. In this case, the imaging device 80 may be connected to each monitor. For example, when the left monitor 40L includes a screen generation unit, the left camera 80L may be directly connected to the left monitor 40L.

  The adjustment system 50 is a system for adjusting the orientation of each of the plurality of cameras. In the present embodiment, the adjustment system 50 includes a drive unit 51, a selection dial 52, and an operation device 53.

  The drive unit 51 is a mechanism that adjusts the orientation of each of the plurality of cameras, and is, for example, a pan / tilt mechanism. In the case of the pan / tilt mechanism, the drive unit 51 is configured by, for example, an electric motor that rotates the camera about the vertical axis and an electric motor that rotates the camera about the horizontal axis. The drive unit 51 may include a mechanism for adjusting the zoom magnification of the camera. In the present embodiment, the drive unit 51 includes a left drive unit 51L that adjusts the direction of the optical axis of the left camera 80L, a right drive unit 51R that adjusts the direction of the optical axis of the right camera 80R, and the optical axis of the back camera 80B. A back drive unit 51B that adjusts the orientation is included.

  The selection dial 52 is a dial for selecting a camera whose orientation is to be adjusted, and is provided in the cabin 10. For example, the selection dial 52 is provided so that the operator can select one of the left camera 80L, the right camera 80R, and the back camera 80B as a camera whose orientation is to be adjusted. Then, the selection dial 52 transmits information for specifying the selected camera to the controller 30. FIG. 4 shows a state in which the right camera 80R is selected by the selection dial 52.

  The operation device 53 is a device for operating the drive unit 51 corresponding to the camera selected by the selection dial 52, and is provided in the cabin 10. In this embodiment, the operation device 53 is a cross key. The operator operates the drive key 51 by operating the cross key. For example, when the right camera 80R is selected by the selection dial 52, the operation device 53 functions as a cross key for operating the right drive unit 51R. In this case, for example, the operator tilts the optical axis of the right camera 80R upward by pressing the upper button of the cross key, and tilts the optical axis of the right camera 80R to the left by pressing the left button of the cross key. Let The operation device 53 may include an operation unit such as a button or a switch for adjusting the zoom magnification of the camera.

  The operation device 53 may be configured with a touch panel, or may be configured with a motion sensor that detects the movement of the operator's finger or hand in a non-contact manner. In the case of a motion sensor, the operator can adjust the orientation of the camera without contaminating the operation unit even when the hand is dirty. Further, the function of the selection dial 52 may be integrated into the operation device 53.

  The adjustment system 50 may be used to adjust the orientation of each of the left rear mirror, the right rear mirror, the right front mirror, and the rear mirror. In this case, the adjustment system 50 may include a mirror driving unit, a mirror selection dial, and a mirror operation device. The mirror selection dial and the mirror operation device may be integrated into the selection dial 52 and the operation device 53, respectively. In addition, in order to support selection of a mirror and a camera using a dial, an instruction sticker indicating the mirror and camera installation positions and codes such as AG may be attached to the cabin 10. In this case, the dial marks are assigned symbols such as A to G.

  The adjustment system 50 allows the shovel operator to adjust the orientation of the camera while sitting in the driver's seat 90. Moreover, when applied to a mirror, the direction of the mirror can be adjusted while sitting in the driver's seat 90. Therefore, the direction of the mirror attached at a position away from the driver's seat can be adjusted by one person, and the time required for adjustment can be shortened.

  The controller 30, the display device 40, the adjustment system 50, and the imaging device 80 operate with power supplied from the storage battery 70. The storage battery 70 is charged by a generator 11 a driven by the engine 11. The electric power of the storage battery 70 is also supplied to the electrical component 72, the starter 11b of the engine 11, and the like. The starter 11b is driven by the electric power from the storage battery 70 to start the engine 11.

  The engine 11 is connected to the main pump 14 and the pilot pump 15 and is controlled by an engine control unit (ECU) 74. The ECU 74 transmits various data indicating the state of the engine 11 (for example, data indicating the coolant temperature detected by the water temperature sensor 11c) to the controller 30. The controller 30 can store this data in the internal memory 30a and display it on the display device 40 at an appropriate timing.

  The main pump 14 supplies hydraulic oil to the control valve 17 through a high pressure hydraulic line. In this embodiment, the main pump 14 is a swash plate type variable displacement hydraulic pump, and the discharge flow rate is controlled by the regulator 14a. For example, the regulator 14 a increases or decreases the discharge flow rate of the main pump 14 in accordance with a command from the controller 30. Further, the regulator 14 a transmits data indicating the swash plate tilt angle to the controller 30. The discharge pressure sensor 14 b transmits data indicating the discharge pressure of the main pump 14 to the controller 30. The oil temperature sensor 14c provided in the pipe line between the main pump 14 and the tank storing the hydraulic oil sucked by the main pump 14 transmits data representing the temperature of the hydraulic oil flowing through the pipe line to the controller 30. To do.

  The pilot pump 15 supplies hydraulic oil to various hydraulic control devices via a pilot line. The pilot pump 15 is, for example, a fixed displacement hydraulic pump.

  The control valve 17 is a hydraulic control device that controls a hydraulic system mounted on the excavator. The control valve 17 includes, for example, a left traveling hydraulic motor 1L, a right traveling hydraulic motor 1R, a turning hydraulic motor 2A, a boom cylinder 7, an arm cylinder 8, a bucket cylinder 9, and the like (hereinafter collectively referred to as “hydraulic actuator”). The hydraulic fluid discharged from the main pump 14 is selectively supplied.

  The operating device 26 is used for operating the hydraulic actuator. In the present embodiment, the operation device 26 includes a left operation lever 26L, a right operation lever 26R, and a travel lever 26C. When the operating device 26 is operated, the hydraulic oil is supplied from the pilot pump 15 to the pilot port of the flow control valve corresponding to each of the hydraulic actuators. Each pilot port is supplied with hydraulic oil having a pressure (pilot pressure) corresponding to the operation content (operation direction and operation amount) of the corresponding operation device 26.

  The pressure sensors 29 a and 29 b detect the pilot pressure when the operation device 26 is operated, and transmit data indicating the detected pilot pressure to the controller 30. The controller 30 detects the operation content of the operating device 26 from the pilot pressure detected by the pressure sensors 29a and 29b.

  Next, the effect of the display system will be described with reference to FIG. FIG. 5 is a perspective view of the interior of the cabin 10 and shows a situation when the front is viewed from the driver's seat in the cabin 10.

  As shown in FIG. 5, a driver's seat 90 is installed in the cabin 10. A left console 90L is installed on the left side of the driver seat 90, and a right console 90R is installed on the right side of the driver seat 90. A left operation lever 26L is attached to the upper part of the front end of the left console 90L, and a right operation lever 26R is attached to a position corresponding to the left operation lever 26L on the right console 90R. A main monitor 40M is attached to the upper part of the front end of the right console 90R.

  In the cabin 10, a left monitor 40L is attached to the left pillar 10PL, and a right monitor 40R is attached to the right pillar 10PR. The left monitor 40L is preferably mounted at a height higher than the height of the main monitor 40M and lower than the height of the left rear mirror 10c. “Height” is, for example, a vertical distance from the ground. Desirably, it is attached at substantially the same height as the left camera 80L. Similarly, the right monitor 40R is desirably mounted at a height that is higher than the height of the main monitor 40M and lower than the height of the left rear mirror 10c. Desirably, it is attached at substantially the same height as the right camera 80R.

  The back monitor 40B is attached to the upper part of the right pillar 10PR so as to be disposed along the front ceiling frame 10PU. The back monitor 40B may be attached to the upper part of the left pillar 10PL so as to be disposed along the front ceiling frame 10PU.

  Thus, the left monitor 40L is arranged as if it were a left rear mirror in the left part of the field of view of the operator of the excavator sitting in the driver's seat and looking at the front. The right monitor 40R is arranged as if it were a right rear mirror in the right part of the visual field, and the back monitor 40B is arranged in the upper part of the visual field as if it was a rear mirror. . Therefore, the operator of the shovel can intuitively recognize that the image displayed on the left monitor 40L is a mirror image image of the left rear of the shovel. Similarly, it can be intuitively recognized that the image displayed on the right monitor 40R is a mirror image image on the right rear side of the shovel and the image displayed on the back monitor 40B is a mirror image image on the rear side of the shovel.

  The images displayed on the left monitor 40L, the right monitor 40R, and the back monitor 40B correspond to images captured by the left camera 80L, the right camera 80R, and the back camera 80B, respectively. That is, the left monitor 40L, the right monitor 40R, and the back monitor 40B independently project different directions. Further, the display of the left monitor 40L, the right monitor 40R, and the back monitor 40B is started simultaneously with the activation of the main monitor 40M when the operator keys on. However, it may be started simultaneously with the startup of the engine 11.

  Further, the left monitor 40L, the right monitor 40R, and the back monitor 40B are attached so as not to obstruct the operator's view through the front window FW. Therefore, in the present embodiment, the left monitor 40L and the right monitor 40R have a size that fits within the width of the left pillar 10PL and the right pillar 10PR, and the back monitor 40B is attached to the upper right corner of the front window FW. However, the left monitor 40L and the right monitor 40R may have a width wider than the width of the left pillar 10PL and the right pillar 10PR, and the back monitor 40B may have a size that fits within the width of the front ceiling frame 10PU. . The left monitor 40L, the right monitor 40R, and the back monitor 40B are attached at positions that do not hinder the opening and closing of the front window FW.

  The screen size and resolution of each of the left monitor 40L, the right monitor 40R, and the back monitor 40B are preferably set so that an image of a person within a predetermined distance (for example, 12 m) from the shovel has a predetermined size (for example, 7 mm × 7 mm) on the screen. Selected to be displayed larger. For example, as the left monitor 40L and the right monitor 40R, a monitor having a screen size of 7 types (7 inches) or more is preferably used, and a monitor having a screen size of 7 types (7 inches) or 8 types (8 inches) is preferably used. Is done.

  The left monitor 40L and the right monitor 40R are attached at the same height with respect to the reference horizontal plane. The reference horizontal plane is, for example, the ground where the excavator is located. In the present embodiment, they are attached so as to be symmetrical with respect to the cab center line indicated by the one-dot chain line in FIG.

  Further, the left monitor 40L, the right monitor 40R, and the back monitor 40B may be configured such that the mounting angle can be adjusted according to the body shape, working posture, etc. of the operator sitting in the driver's seat 90.

  As shown in FIG. 5, a driver's seat 90 is provided in the center of the cabin 10, and a left operation lever 26L and a right operation lever 26R are provided on both sides thereof. Therefore, the operator sits in the driver's seat 90, operates the left operation lever 26L with the left hand, and operates the right operation lever 26R with the right hand, thereby moving the bucket 6 to a desired position and performing excavation work. Can do.

  An image display section 41M and a switch panel 42M of the main monitor 40M are installed on the right front side of the driver seat 90. The operator of the shovel can grasp the operation state of the shovel by looking at the image display unit 41M. In the example of FIG. 5, the image display unit 41M displays an overhead image. The bird's-eye view image is an example of a composite image generated based on images captured by the back camera 80B, the left side camera, and the right side camera. Specifically, the bird's-eye view image is a viewpoint conversion image representing a state when the periphery of the excavator is viewed from the virtual viewpoint directly above.

  A left monitor 40L is attached to the left pillar 10PL, and a right monitor 40R is attached to the right pillar 10PR. The left monitor 40L and the right monitor 40R are attached at positions where the operator can grasp the left monitor 40L and the right monitor 40R with the peripheral visual field when the operator grasps the bucket 6 with the central visual field through the front window FW of the cabin 10. It has been. Therefore, when the operator is performing excavation work while grasping the bucket 6 with the central visual field, the left and right rear views of the shovel projected on the left monitor 40L and the right monitor 40R without moving the line of sight It can be seen from the field of view.

  A selection dial 52 and an operation device 53 are installed on the left console 90L. When the operator wants to change the range in which the left monitor 40L that displays the left rear image of the shovel is displayed, the operator operates the selection dial 52 to select the left camera 80L. Then, by operating the operation device 53 and changing the direction of the left camera 80L, the range that the left monitor 40L projects can be changed. The same applies when changing the range in which the left rear mirror 10c is projected.

  Next, another configuration example of the display system mounted on the excavator in FIG. 1 will be described with reference to FIG. FIG. 6 is a block diagram showing another configuration example of the display system. In the example of FIG. 6, wide-angle cameras are employed not only for the back camera 80B but also for the left camera 80L and the right camera 80R. Therefore, a mirror image of a selected portion of the image captured by the left camera 80L is displayed on the left monitor 40L, and a mirror image of a selected portion of the image captured by the right camera 80R is displayed on the right monitor 40R. Is displayed. For example, even when the right camera 80R has a horizontal angle of view α3 (see FIG. 2), only the portion corresponding to the horizontal angle of view α2 (see FIG. 2) is displayed on the right monitor 40R.

  The display system of FIG. 6 is different from the display system of FIG. 4 in that the drive unit 51 is omitted, but is common in other points. Specifically, the adjustment system 50A in FIG. 6 differs from the adjustment system 50 in FIG. 1 in that the controller 30 artificially adjusts the orientation of the camera by image processing instead of the drive unit 51 in FIG. In common. Therefore, description of common parts is omitted, and different parts are described in detail.

  In this embodiment, the operation device 53 is a cross key. The operator operates the cross key to change the range displayed on the monitor. The range displayed on the monitor means a portion used for generating a mirror image among images captured by the camera. For example, when the right camera 80R is selected by the selection dial 52, the operation device 53 functions as a cross key for changing the range displayed on the right monitor 40R that displays a mirror image derived from the right camera 80R. In this case, the operator moves the range displayed on the right monitor 40R out of the entire image captured by the right camera 80R, for example, by pressing the up button of the cross key. Alternatively, by pressing the left button of the cross key, the range displayed on the right monitor 40R in the entire image captured by the right camera 80R is moved to the left. In this way, the controller 30 adjusts the range in which the right monitor 40R is projected according to the operation input to the operating device 53. Specifically, when the screen generation unit 30b of the controller 30 generates a mirror image by extracting a portion corresponding to the horizontal angle of view α2 from the image captured by the right camera 80R having the horizontal angle of view α3, Another portion corresponding to the horizontal angle of view α2 is extracted. Then, a mirror image of the newly extracted part is generated, and the generated mirror image is displayed on the right monitor 40R. That is, all the extracted portions are portions corresponding to the horizontal angle of view α2, and the direction of the bisector of the horizontal angle of view α2 changes.

  With this configuration, the display system of FIG. 6 can realize the same effect as the effect of the display system of FIG. That is, the same effect as when the direction of the camera is adjusted by the drive unit 51 can be realized.

  As mentioned above, although the shovel which concerns on the Example of this invention was demonstrated, this invention is not limited to the said Example. For example, various modifications and improvements can be applied to the above embodiment within the scope of the present invention.

  Moreover, this application claims the priority based on the Japan patent application 2015-256665 for which it applied on December 28, 2015, and uses all the content of this Japan patent application for this application by reference.

  DESCRIPTION OF SYMBOLS 1 ... Lower traveling body 1L ... Left traveling hydraulic motor 1R ... Right traveling hydraulic motor 2 ... Turning mechanism 2A ... Turning hydraulic motor 3 ... Upper turning body 3a ... Cover 3b ... Counter weight 3c ... Platform 3d ... Hand rail 3e ... Tool box 4 ... Boom 5 ... Arm 6 ... Bucket 7 ... Boom cylinder 8 ... Arm Cylinder 9 ... Bucket cylinder 10 ... Cabin 10a ... Stay 10c ... Left rear mirror 10PL ... Left pillar 10PR ... Right pillar 10PU ... Front ceiling frame 11 ... Engine 11a ... Generator 11b ... Starter 11c ... Water temperature sensor 14 ... Main pump 14a ... Regulator 14b ... Discharge Pressure sensor 14c ... Oil temperature sensor 15 ... Pilot pump 17 ... Control valve 26 ... Operating device 26C ... Traveling lever 26L ... Left operating lever 26R ... Right operating lever 29a, 29b ... Pressure sensor 30 ... Controller 30a ... Internal memory 30b ... Screen generator 40 ... Display device 40B ... Back monitor 40M ... Main monitor 40L ... Left monitor 40R ... Right monitor 41M Image display unit 42M Switch panel 42a Light switch 42b Wiper switch 42c Window washer switch 50, 50A Adjustment system 51 Drive unit 51B ... Back drive unit 51L ... Left drive unit 51R ... Right drive unit 52 .... Selection dial 53 ... Operating device 70 ... Storage battery 72 ... Electrical equipment 74 ... Engine control device 80B ... Back camera 80L ... Left camera 80R ... Right camera 90 ... Driver's seat 90L ... Left console 90R ... Right console

Claims (8)

A lower traveling body and an upper swinging body attached to the lower traveling body so as to be able to swivel
A cab attached to the upper swing body,
A left monitor attached to the left pillar inside the cab;
A right monitor attached to the right pillar inside the cab;
A left camera for imaging a left region of the upper swing body;
A right camera that captures an area on the right side of the upper swing body;
A control device for controlling each of the left monitor and the right monitor,
The control device continuously displays a mirror image generated from an image captured by the left camera on the left monitor, and continues a mirror image generated from an image captured by the right camera on the right monitor. Display,
Excavator. The left monitor and the right monitor are mounted at the same height with respect to a reference horizontal plane;
The excavator according to claim 1. Each of the left monitor and the right monitor has a screen size of 7 inches (7 inches) or more.
The excavator according to claim 1. A back monitor attached to the upper part of the right pillar so as to be arranged along the front ceiling frame inside the cab;
A back camera for imaging a rear region of the upper swing body,
The control device continuously displays a mirror image generated from an image captured by the back camera on the back monitor.
The excavator according to claim 1. The mounting height of each of the left camera and the right camera is between the height of the platform of the upper swing body and the height of the upper surface of the cab.
The excavator according to claim 1. The horizontal angle of view of each of the left camera and the right camera is 20 to 70 degrees.
The excavator according to claim 1. A mechanism for adjusting the orientation of each of the plurality of cameras including the left camera and the right camera;
The mechanism is operated via an operating device installed inside the cab.
The excavator according to claim 1. The control device adjusts a range in which each of the left monitor and the right monitor is projected according to an operation input to an operation device installed inside the cab.
The excavator according to claim 1.

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